Seneca ZIP Codes — Faulk County, SD

There is one unique ZIP code in Seneca, South Dakota and it is 57473. Area code: 605.
1
ZIP codes
185.28
sq mi land
3.35
sq mi water
605
area code
Seneca, SD ZIP code map

About Seneca, SD

Seneca, South Dakota, is a small, charming town located in Faulk County. Known for its rural landscape and close-knit community, Seneca offers a unique glimpse into life in South Dakota. The city is an appealing destination for those who appreciate tranquility and the beauty of nature.

Location & geography

Seneca is strategically located in the north-central part of South Dakota, surrounded by rolling hills and expansive farmland. The closest cities include Faulkton, approximately 12 miles to the south, and Eureka, about 17 miles to the northwest. Covering an area of 185.28 square miles of land and 3.35 square miles of water, Seneca features a predominantly rural terrain with picturesque views of the South Dakota landscape.

Community & economy

The character of Seneca is characterized by its friendly residents and a strong sense of community spirit. Predominantly an agricultural hub, the local economy thrives on farming, with residents engaged in various agricultural industries. Daily life in Seneca is peaceful, often revolving around community events, local gatherings, and outdoor recreation.

Transportation

Seneca is easily accessible via South Dakota Highway 20, which runs east-west and connects to larger highways within the state. The nearest major airport is located in Aberdeen, approximately 40 miles to the east. Public transit options are limited, making personal vehicles the most common means of transport for residents and visitors.

History

Seneca was established in the late 19th century, growing primarily as an agricultural community during South Dakota's settlement period. Key industries have historically revolved around farming and livestock, contributing to the local economy's stability. Throughout the years, the town has maintained its rural charm, reflecting the resilience and commitment of its residents.

Did you know?

One surprising fact about Seneca is that it has only one ZIP code, which is 57473. Additionally, despite its small size, Seneca serves as a point of interest for those exploring the rural landscapes of South Dakota.

ZIP codes for Seneca, SD (1)
ZIP code City County Map
57473 Seneca Faulk View map

Demographics & statistics

288
Population
48.8
Median age
$24,286
Median household income
$24,405
Per capita income
$123,100
Median home value
$0
Median monthly rent
94.6%
Home ownership
51.7%
Poverty rate
0.0%
Unemployment
95
Housing units
8.6%
Bachelor's or higher

Age distribution

Male Female
5
5–9
7
31
10–14
39
14
15–19
17
4
35–44
5
24
45–54
29
3
55–59
4
20
60–64
26
4
65–74
4
14
75–84
18
9
85+
11
← Male
Female →

Age summary

GroupCount%
Under 1811339.2%
18 and over17560.8%
65 and over6020.8%
Median age48.8 years

Race & ethnicity

White 100%
GroupCount%
White288100%

Household income

Under $10k 5.4%
$10k–$15k 5.4%
$15k–$25k 50.0%
$25k–$35k 5.4%
$35k–$50k 6.8%
$50k–$75k 5.4%
$100k–$150k 21.6%
Range% of households
Under $10k5.4%
$10k–$15k5.4%
$15k–$25k50.0%
$25k–$35k5.4%
$35k–$50k6.8%
$50k–$75k5.4%
$100k–$150k21.6%
Median income$24,286

Housing

Home values

Under $50k 28.6%
$50k–$100k 4.3%
$100k–$150k 18.6%
$150k–$200k 40.0%
$200k–$300k 8.6%

Housing overview

MetricValue
Median home value$123,100
Median rent / month$0
Owner occupied94.6%
Renter occupied5.4%
Vacant25.3%
Single-family detached100.0%
Large apartment buildings0.0%
Mobile homes0.0%
Median rooms10.0
Avg household size (owned)3.66

Year built

Era%
2020 or later0.0%
2010–20191.0%
2000–200944.4%
1990–19992.0%
1980–19891.0%
1970–19790.0%
1960–19697.1%
1950–19596.1%
1940–19490.0%
1939 or earlier38.4%

Bedrooms

Size% of units
No bedroom (studio)0.0%
1 bedroom4.0%
2 bedrooms8.1%
3 bedrooms32.3%
4 bedrooms22.2%
5+ bedrooms33.3%

Vehicles per household

Vehicles% of households
No vehicle0.0%
1 vehicle18.9%
2 vehicles18.9%
3 or more62.2%

Heating fuel

Fuel type%
Utility gas2.7%
Electricity58.1%
Propane / LP gas28.4%
Fuel oil5.4%

Households & families

Household typeCount%
Married-couple family4459.5%
Cohabiting couple34.1%
Male householder, no spouse1216.2%
Female householder, no spouse1520.3%
Households with children under 183243.2%
Households with seniors (65+)3141.9%
Average household size3.89

Marital status

StatusMaleFemale
Never married44.9%31.3%
Married51.4%49.5%
Separated0.0%0.0%
Widowed0.0%10.1%
Divorced3.7%9.1%

Education

Less than 9th grade 8.6%
Some HS, no diploma 0.0%
HS graduate 58.9%
Some college, no degree 3.4%
Associate's degree 20.6%
Bachelor's degree 4.6%
Graduate / professional 4.0%
Metric%
HS diploma or higher91.4%
Bachelor's or higher8.6%

School enrollment (ages 3–17)

TypeCount%
Nursery / preschool32.7%
Kindergarten00.0%
Elementary school7969.9%
High school3127.4%
College / grad school00.0%

Employment

Industry of employment

Agriculture & mining 82.5%
Professional & management 5.0%
Construction 3.8%
Retail trade 3.8%
Finance & real estate 3.8%
Transportation & utilities 1.3%

Occupation

Category%
Management, business & arts82.5%
Service0.0%
Sales & office7.5%
Natural resources & construction1.3%
Production & transportation8.8%

Employment type

Type%
Private sector21.3%
Government1.3%
Self-employed77.5%
Unpaid family workers0.0%

Commute

Method%
Drive alone16.3%
Carpool5.0%
Public transit0.0%
Walk1.3%
Other means0.0%
Avg commute (minutes)0.0

Poverty

All people 51.7%
Under 18 years 77.9%
18 and over 34.9%
Married-couple families 63.6%
Female-led households 0.0%

Income support

Source% of households
Social Security41.9%
Retirement income0.0%
Supplemental Security9.5%
Cash public assistance0.0%
Food stamps / SNAP0.0%

Health indicators

Condition%
High blood pressure35.4%
High cholesterol33.2%
Heart disease8.1%
Stroke3.6%
Asthma8.7%
Arthritis27.9%
Kidney disease3.4%
Pulmonary disease6.9%
Cancer8.9%
Behavior / access%
Binge drinking17.1%
No physical activity24.2%
Less than 7 hrs sleep27.8%
Fair or poor health12.1%
Poor mental health9.8%
Poor physical health9.5%
No health insurance10.9%
Visited doctor (checkup)77.3%
Visited dentist68.7%
Cholesterol screening92.0%
Teeth loss12.9%

Veterans & disability

VeteransCount%
Civilian veterans84.6%
Disability%
Any disability4.9%
Under 180.0%
18–64 years5.2%
65 and over13.3%

Health insurance coverage

Type%
Private insurance82.3%
Public insurance22.2%
Uninsured under 190.0%

Language & origin

Language spoken at home (age 5+)

LanguageCount%
English only288100.0%
Spanish155.2%
Other Indo-European155.2%
Asian & Pacific Islander00.0%
Other languages00.0%

Place of birth & citizenship

OriginCount%
Native born (US)27194.1%
Born in same state27194.1%
Born in different state26491.7%
Foreign born00.0%
Naturalized citizen175.9%
Not a US citizen17100.0%

Ancestry

AncestryCount%
Italian16758%
Dutch5619.4%
French82.8%
AncestryCount%
Polish51.7%
English10.3%

Technology access

Metric% of households
Computer access25.7%
Internet access89.2%

Source: U.S. Census Bureau, American Community Survey 2025 estimates.

Frequently asked questions
What ZIP codes does Seneca, SD have?
Seneca, SD has one ZIP code: 57473. Each ZIP code serves a distinct delivery area within the city and surrounding region.
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